Pausing experiments and sound stimuli question

[Jeff Maxwell]

regarding the pause issue, i haven't tested this and there might be a
much easier way :)  try creating a very simple procedure in your
experiment consisting of a blank or "pause" text object (-1 ms
[infinite] duration, set to terminate with a particular response].  you
wouldn't call this procedure in your normal list of events.

then setup your experimental procedure(s) to allow input (such as "P")
into an object that is routinely called (e.g. a wait object used to
separate trials; "ITIinterval").  follow ITIinterval with a script
object and use an "if then else" statement to monitor input to
ITIinterval (e.g. ITIobject.RESP value) and whenever that value is equal
to your pause command ("P"), jump/goto a couple of additional lines of
script that invoke the PauseProc procedure. 

good luck, and if you learn of a way to send multiple event markers
during the course of a single long event, please let me know.

cheers,
max    



-----Original Message-----
From: eprime at mail.talkbank.org [mailto:eprime at mail.talkbank.org] On
Behalf Of Jenny Thomson
Sent: Friday, February 22, 2002 2:48 AM
To: eprime at mail.talkbank.org
Subject: Pausing experiments and sound stimuli question


We are currently developing a paradigm where a series of sounds are
presented to children as part of an ERP study (i.e. long blocks of
sounds not requiring behavioural responses for continuation)

1. We need a possibility of pausing the experiment if the child needs a
break, but can only seem to find the abort command  (Ctrl+Alt+Shift ) to
do this - has anyone got a more elegant way to pause experiments mid
flow?

2. We are also thinking of using continuous sound waves in some
conditions - has anyone tried this with EGI/Netstation and know of a way
of sending trigger tags to Netstation WITHIN the course of one sound
wav.?

Thanks,
Jenny Thomson
Psychology Dept., 
University of Jyväskylä, Finland